Any way to remove a follower?

I'm looking for a way to remove an e-mail blog follower from the follower list.

Background: The person in questions has stated repeatedly that he he believes that I am sending him unrequested texts and has proven very resistant to my attempts at explaining to him that he has subscribed to my blog and that he needs to undo it. I even explained to him how to implement an e-mail filter, to no avail. That would not be all that horrible if he didn't take it upon himself to comment in a very vicious tone on anything I write. Hence, I would like to quietly solve the situation without further confrontation.

For trolls, you can “blacklist” them at Settings > Discussion toward the bottom of that page. Enter their email address, their username, and if they included it, their website. That will automatically send them to moderation so that their comments do not appear on the blog. Do note though that if they are determined, they can use a different email address or username to get around that.

Also, do not put their IP address in the blacklist. IP addresses are no longer unique to individual conmputers, and you may end up blocking legitimate visitors, beacuse ISPs have been placing hundreds of us in the same IP block to save money for a decade or more now.

I suggest is to set your blog so that first time commenters are held in moderation until the first comment is approved, then from that point forward they will not need approval. Settings > Discussion. The next step beyond that is to set your discussion page up so that all comments are held in Moderation until approved.